Improved cast-iron car-wheel



2 Svheete-'Sheet 1.

-' G. G. LOBDELL.

e Car Wheel.

Patented Jan. 12, 14869.

2 Shets--Sheetv 2.

G. G. LOBDELL.

Car Wheel.

Patented Jn. 12, 1869.'

No. l85,745.

y l.. 5 "l/0%..,

NJ'ETEHS. PHOTO IJT WNSHINGTDN. D C4 GEoRGE G. LOBDLL, 0F WIL1\i1'1\1 3.lo1\1,- DELAWARE. team Para# No. 85,745, dated ,Tama/ry 12, 1869.

narnovnn CAST-'IRON nnen-Wiener.

*wo- The Schedule referred to in theseLettns Patent; and making p art of the ca me.

To -all 'whom it may camera:

Be it known that I, GEORGE G. LoBDnLL, of Wilmington, Delaware, have invented an Improvement in Gast-Iron Gar-Wheels; and I do hereby declare-the followingto be a full, clear, and exact descriptionfof the same.

My invention consists ofan improvement, fully .de-

scribed hereaer, in the cast-iron car-,wheel for which Letters Patent were granted to Nathan Washburn,

October 8, 1850, my-improvement being such as vto add strength to the wheel at the point where it is most liable to be broken.

In order to enable others skilled in the art to make my invention, I will now proceed to describe the manner of carrying-it into effect, reference being had to the accompanying drawing, which forms a part of this specification, and in whichu Figure 1, SheetNo. 1,' is a transverse section of my vimproved car-wheel;

Figure 2, a face view; Figure 3, al section of part of the wheel, drawn to an enlarged scale;

Figure4, a sectional view of part of a Washburn.

wheel; y 'gure Sheet No. 2, a full-sized sectional-view of part of a Washburnwheel; and

Figure 6, ya full-sized sectional view of part of my improved wheel. A is th'e hub of the wheel, from which hub project the two concave-.convex plates, a and a', enclosing an annular space, m, and meeting at @from which point the single plate e, forming a continuation of the plates a and a, extends to the rim D of the wheel, in the conf cave portion of theface of which is a number of curved As far as the above `explanation is concerned, the wheel is similar to that for which Letters Patent were granted to Nathan Washburn, October 8, 1850, a p0rtion of which wheel is illustrated in fig. 4.

The great objection to the Washburn wheel is its, liability to break on the line y, g. 4, an objection which I obviate in the following manner:

It will be seen, on reference to fig. 3, in-.which rib, c', at the edge of Vwhich the strengthening-ribs f terminate, as shown in iig. 3. 1

In the Washburn wheel, the plate'e meets the rim at such a point that the flanged portion of the rim projects beyond the plate to a distance which renders the rim somewhat weak. This will be understood by reference to the'lines t t', fig. 1.

part overcame this defect, but by adopting my improvefracture, w, figs. 3 and 4. v

In fact, by the arrangement o'f the rim D, its ilange J1., annular ribi, plate e", and strengthening-ribs f, a

wheel much superior -in Astrength and durability t'o the ordinary Washburn wheel is produced.v y

In addition to the strength imparted by the rib i, I

have found that when the flange his widened'to form this rib, the wheel will be chilled to agreater depth adjacent to the 4flange h, than. when the latter retains its 'usual form.

- This is clearly illustrated in Sheet No. 2, where the line a: y z, iig. `5, indicates the depth to which the ordinary Washburn wheel is chilled Orhardened in casting, the thickness of the chill being less atthe point y,than elsewhere, although it is desirable that it should penetrate the wheel further at vthis point than at any other.

In myimproved wheel, iig. 6, the depth of the' chill is as great at the point y as elsewhere, and the strength thus imparted to the Wheel is much greater than-results from the mere increase of thickness by the addi# tion, of the rib i. y

I claim as my invention, and desire to secure 4by Letters Patent, .as an4 improvement on the car-wheel for which Letters Patent were granted to Nathan l' Washburn, October 8, 1850,-v

lhe combination and arrangement of the curved plates'a af, rim D, flange h,\st1'engtheningribs f, and rib i., substantially as described.

In testimony whereof, I have signed'my nameto this specification, in the presence .of twovsubscribing wit;

messes.

GEORGE' G. LOBDELL. Witnesses:

JOHN WHITE, C. B. Pinon.

The strengthening-ribs `of the'Washburn wheel in 

